If you're concerned about perch in trout-stocked lakes, you should read the background information and take the survey on the problem at the
My Wild Alberta Web Site. The survey closes March 22.
I also wrote about it in the current (March)
Alberta Outdoorsmen. After a few years the perch often end-up stunting the fish in both their population and the trout. Because rehabilitation is expensive and so is trout stocking, the government could end-up abandoning these lakes.
With regard to muddy tasting trout, I find they taste fine during the winter. In the summer, not so good.